In this thesis we claim the recontextualization of the Mirouer des simples ames in its medieval context so that its images can be restored as far as perception, rhetoric and reception are concerned. By this work we place the text in contexts where the audience was no necessarily clerical or educated: we justify the textual visibility because of the didactic character of the device, and we take it as a category of historical analysis. We therefore reconstruct the visible aspects of the Mirouer and explain its poetics. In the first place, we decode the images through the philological analysis of the text and, in the second place, we compare the poretean work with other documents from that period (written and, mostly, visual ones). In short, we propose a hermeneutic of the mere written word through the verbal mechanisms that create the visualization of the image in the poretean work.